（2）Molecular quantity:100000--200000
（3）Density:2.13g/cm3
The Fluorine atoms in the molecular structure make it have these advantage:
(1) temperature resistance,
(2) non hygroscopicity
(3) air tightness.
The chlorine atom in molecular structure leads to features:
(
1) Good processing fluidity,
(2) transparency
(3) hardness characteristics.
C-Cl in chemical structure make it the hardness, rigidity and creep resistance are good.Its mechanical strength and hardness are superior to PTFE.
